Improvement in drill-stocks



1. HAMMOND.

Drill-Stock.

Patented Oct. H, 1875.

' ATTORNEYS UNITED STATES PATENT OFFICE.

JONATHAN HAMMOND, OF BELLEVILLE, INDIANA.

IMPROVEMENT IN DRILL-STOCKS.

Specification forming part of Letters Patent No; 168,741, dated October11, 1875; application filedl J fine 26, 1875.

To all whom it may concern:

Be it known that I, JONATHAN HAMMOND, of Belleville, in the county ofHendricks and State of Indiana, have invented a new and valuableImprovement in Drill-Stock; and I do hereby declare that the followingis a full, clear, and exact description of the construction andoperation of the'same, reference being had to the annexed drawings,making a part of this specification, and to the letters and tigures ofreference marked thereon.

Figure 1 of the drawings is a representation of a plan view of mydrill-stock,-and Figs. 2 and 3 are sectional detail views of the same.

This invention has relation to drill-stocks; and it consists in theconstruction and novel arrangement of the piniou-box, shoulderedpinion-shaft, tool-socket, and threaded stopsleeve, all as hereinaftershown and described.

In the accompanying drawings, the letter A represents the drill-stock,and B the large wheel or cogged gear. 0 represents a pinion working in apinion-box, D. This pinion O is held in position by a shoulderedpinionshatt, E, which passes through said pinion and enters a socket, a,made in the drill-stock. A threaded stop-sleeve, F, is placed over' theshouldered pinionshaft E to hold said shaft in position.

vided with a screw-thread, b, which enters the drill-stock A, and iskept from turning by a set-screw, re, placed forward of the pinion-boxD. Ashoulder, f, is made within the threaded stop-sleeve F, which abutsagainst another shoulder, 0, made upon the shaft E, for the purpose ofkeeping said shaft from falling out This threaded stop-sleeve is pro- Iwhen the machine is held in a downward position. A removabletool-socket, G, is placed upon the end of shouldered pinion-shaft E,which protrudes from the threaded stop-sleeve F, said shaft beingprovided with a thread, 6?, for engagement with the end of thedrillsocket. This drill-socket G is provided with a square hole, g, inwhich any common drill may be placed, said drill being held in place bya set-screw, g, in the end of said drill-socket.

A loop or handle, H, is made upon the end of the drillstock'A, for thepurpose of holding the machine up to its work. The large cogwheel B isprovided with a crank orhandle, B, which is placed upon its peripheryfor the purpose of driving the drill.

The gearing of this machine may be made beveled or otherwise, to suitthe convenience of the manufac urer.

What I claim as new, and desire to secure by Letters Patent, is-

Ina drill-stock, the stop-sleeve F, shouldered and screw-threaded at itsupper end, in combination with the pinion-box D pinion O, shoulderedpinion-shaft E, screw-threaded at its lower end, and removable from thepinion at its upper end, and removable tool-socket Gr, substantially asdescribed, and for the purpose set forth.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two Witnesses.

JONATHAN HAMMOND.

Witnesses:

W. H. HUssEY, H. L. PREWETT.

